Electrical hoisting apparatus



2 Sheets-Sheet 1.

(No Model.)

H. O. SPAULDING. ELECTRICAL HOISTING APPARATUS.

No. 516,843. Patented Mar. 20,1894.

[NVENTUR WITNEESES (No Model.) 2 Sheets-Sheet 2.

H. O. SPAULDING.

ELECTRICAL HOISTING APPARATUS.

N0. 516,843. Patented Mar. 20, 1894.

WITNESSES INVENTEIR Tu. NAnouAL LIYNOGIAPNING count".

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UNITED STATES PATENT OFFICE.

HOLLON C. SPAULDING, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO THE THOMSON-HOUSTON ELECTRIC COMPANY, OF CONNECTICUT.

ELECTRICAL HOlSTlNG APPARATUS.

SPECIFICATION forming part of Letters Patent No. 516,843, dated March 20, 1894.

Application filed. February 12, 1890. Serial No. 840,224. (No model.)

To aZZ whom it may concern.-

Be it known that I, HOLLON C. SPAULmN 'a citizen of the United States, residing at Boston, Massachusetts, have invented certain new and usefullmprovements in Electrical l'loisting or lVinding Apparatus, of which the following is a specification.

My invention consists in inolosing the operating motor within the drum upon which the cable is adapted to be wound.

My invention is illustrated in the accompanying drawings, in which Figure 1 is an end elevation of a machine embodying myinvention. Fig. 2 is a vertical, axial section thereof. Fig. 3 is an end elevation opposite to that in Fig. 1.

Referring to the drawings, A is a drum adapted to wind up a rope or cable. W'ithin this drum is a motor, having its armature shaft concentric with the drum; the drum having a bearing upon said shaft. The motor has its field magnets, B and Cattached to the drum, so that the material of the drum forms the yoke or neutral part of the magnet. These magnets are, in the illustration shown, two in number and are placed diametrically opposite one another, and extend radially to the drum. Between the two magnets is an armature D, having its shaftprolonged, and resting in external bearings E. and F. Upon one end of the armature shaft is a pinion G engaging with a gear H, the shaft of which has a pinion K engaging with an internal gear, outside of the flange of drum A. By this arrangement it will be seen that the armature and the drum carrying the field mag nets, both rotate relatively to each other, and it therefore becomes necessary to provide a traveling contact fol-introducing the current. This is constructed as follows. Upon drum A is fastened an insulating diskL carrying four concentric metal rings M. Two of these rings are permanently connected through the drum with the field magnets 13 and C, while the other two rings are connected respectively to the two commutator brushes 0 and l? which are carried by the drum. These rings are shown more plainly in Fig. 3 where it will also be observed, that they are each provided with a brush resting constantly upon them, so that while the drum rotates, the current is constantly introduced to the drum from the stationary brushes. These brushes are marked 1, 2, 3 and i respectively. These brushes may be connected up in any desirable way, so that the motor may have its field and armature in series, or in shunt. The drum A is provided with a strap brake S, the opposite ends of the strap being brought to a cam T, Fig. 3. The cam T, is provided with a lever U, upon which is a weight V. The outer end of the arm U is attached to the core of a magnet R which is in series with the motor. \Vhenever the current is on, the weight V is lifted, and the strap brake is released. henever the current is shut off the brake is instantly applied, and the drum stopped.

What I claim as new, and desire to secure by Letters Patent, is-

l. The combination in an electric hoisting or winding machine of a drum, radial field magnets on opposite sides of the armature projecting from the drum and having the latter'for their yoke or neutral part, and an armature concentric with the drnm and geared thereto.

2. The combination of the armature mounted in bearings and rotating in a given direction with the winding drum rotating in the opposite direction whose ends have bearings on the armature shaft,-and radial field magnets extending in from the surface of the winding drum, the latter forming the yoke or neutral part for completing the magnet circuit and gearing interposed between the armature and the drum.

3. The combination of the armature and inclosing winding drum forming the field of an electric hoisting or winding machine, with gearing between the armature and drum, out- I side of the latter, as described.

In witness whereof I have hereunto set my hand this 8th day of February, 1890.

HOLLON C. SPAULDING.

Witnesses:

E. N. BENTLEY, G. R. Bnonenrr. 

